If a - b = 5, a² + b2 = 49, find the value of ab.
Answers
Answered by
10
Answer:
12
Step-by-step explanation:
Given
a - b = 5
a² + b² = 49
Solution
(a - b)² = a² + b² - 2ab
(5)² = 49 - 2ab
2ab = 49 - 25
2ab = 24
ab = 12
Answered by
2
Answer:
ab=12
step-by-step explaination
(a-b)^2=a^2+b^2-2ab
(5)^2= 49-2ab
2ab= 49-25
2ab=24
ab=12
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